Copy letter from Robert William Frederick Harrison, to Messrs Cassell & Company Limited, La Belle Sauvage, Ludgate Hill, E.C. In 1895 the Royal Society published in the form of an extra volume of the 'Philosophical Transactions [of the Royal Society]' a paper by Professor A W Rucker and Dr T E Thorpe entitled 'A Magnetic Survey of the British Isles for the Epoch January 1, 1891'. The paper had 14 folded plates. Asks if the Messrs could let them know what the cost was of this series of maps. There is no record at the Society, it being probable that the authors paid the Messrs direct. 12 September 1906